ASTM A310:

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310, combining excellent high temperature properties with good weldability and ductility, is designed for high temperature service. SS 310 resists oxidation in continuous service at temperatures up to 1150°C provided reducing sulfur gases are not present. SS 310 is also used for intermittent service at temperatures up to 1040°Cs .

310 has forming capabilties similar to that of Type 304. It can be easily formed into most shapes. Machinability Grades 310/310SS are similar in machinability to type 304. Work hardening can be a problem and it is normal to remove the work hardened layer by using slow speeds and heavy cuts, with sharp tools and good lubrication. Powerful machines and heavy, rigid tools are used.

310 is welded with matching electrodes and ﬁller metals. The alloys are readily welded by SMAW (manual), GMAW (MIG), GTAW (TIG) and SAW. Electrodes to AWS A5.4 E310-XX and A 5.22 E310T-X, and ﬁller metal AWS A5.9 ER310 are used. Argon is shielding gas. Preheat and post heat are not required, but for corrosion service in liquids full post weld solution annealing treatment is essential. Pickling and passivation of the surface to remove high temperature oxides are essential to restore full aqueous corrosion resistance after welding. This treatment is not required for high temperature service, but welding slag should be thoroughly removed

HEAT TREATING - Forging, Normalizing, and Annealing:

310 is solution annealed by heating to temperature range 1190-2050 F, holding at temperature until thoroughly soaked, then water quenching.